The Apache HTTP Server, commonly referred to as Apache, is one of the most widely used web servers around the world. It provides many powerful features, including dynamically loadable …
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Whenever you create SSH tunnel or port forwarding, by default, it is only available for the local host. Unless specified, it listens to the loopback IP address or the localhost. …
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DokuWiki is a powerful but simple to use Wiki and is mainly aimed at creating documentation. Another great thing about it is that it supports plugin. You can find various plugins hosted at DokuWiki’s plugin page

There are 2 methods i]to installing plugins for DokuWiki, and you can choose any of these 2 methods;

KDE looks for programs in the ~/.kde/Autostart directory to be executed during it’s startup. The way to execute programs as KDE starts would be to;

1. Copy programs directly to the directory
2. Create (soft) link to programs from the directory
3. Create a script which will execute other programs

The first method is very straightforward, and the second method can be achieved using the ln command. The following example is to run superkaramba as KDE starts.

$ cd ~/.kde/Autostart/
$ ln -s /usr/bin/superkaramba mykaramba

The third option is my personal favorite, as it provides a great level of flexibility. The following is an example bash script placed in the ~/.kde/Autostart/ directory to run gpg-agent, export a variable, and start the program katapult and conky;

#!/bin/bash
 
/usr/bin/gpg-agent --daemon --use-standard-socket &
export GPG_AGENT_INFO=/home/shakir/.gnupg/S.gpg-agent
/usr/bin/katapult &
/usr/bin/conky &

Please make sure all programs are executable by running chmod, probably as the following example;

$ chmod +x ~/.kde/Autostart/*

Redmine is a web based project management application written in Ruby, and is based on the Ruby on Rails (RoR) framework. It has a very clean user interface and comes with a good list of features. It is probably the easiest to use and the most complete web based (software) project management tools available.

Redmine package is available in Ubuntu, which makes installation easy. It is however not very straightforward, and this tutorial will guide you step-by-step in installing Redmine in your Ubuntu machine.

This tutorial is based on Ubuntu 10.10, though it might be compatible with other release as well. The steps below details the installation. It assumes you are to use and to do a fresh installation of Apache and MySQL. A screencast of the whole installation and configuration process is also available at the end of this article.

Ubuntu does not come with SSH server installed by default but could be installed and enabled easily with the following steps from the comand line;

1. Update package list from the repository.

   sudo apt -y update

2. Install openssh-server package.

   sudo apt install -y openssh-server

3. Check if sshd server is running.

   sudo systemctl status ssh

4. Optionally, disable sshd from running by default during system bootup.

   sudo systemctl disable ssh

5. sshd could be re-enabled at later times.

   sudo systemctl enable ssh

Git is a by far the most widely used distributed version control system while being free and open source.

Despite the popularity, it’s not installed by default in Ubuntu. You can install the program by following these steps;

1. Update apt‘s package list

   $ sudo apt -y update

2. Install git-core package

   $ sudo apt -y install git-core

3. Test by running git from the command line

   $ git
   usage: git [--version] [--help] [-C <path>] [-c name=value]
              [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
              [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]
              [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
              <command> [<args>]
   
   These are common Git commands used in various situations:
   
   start a working area (see also: git help tutorial)
      clone      Clone a repository into a new directory
      init       Create an empty Git repository or reinitialize an existing one
   ------ snipped ------

Apt-get is an advanced packaging tool for Ubuntu and other Debian-based Linux distribution, used primarily to install packages into the system. Running the following apt-get command will automatically download and install the package and all it’s dependencies.

sudo apt-get install package-name

If you are for some reason want apt-get to just download the packages and dependencies without installing it, simply add -d switch to the command as the following.

sudo apt-get install -d package-name

To confirm that the package is not installed, you’re presented with the following output when the command done executing.

Download complete and in download only mode

1. Install the latest Java Runtime Environment.

   # yum install -y java-1.8.0-openjdk

2. Add Elasticsearch repository to yum.
   1. Download and install the public signing key.

      # rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch

   2. Add the following lines to /etc/yum.repos.d/elasticsearch.repo.

      [elasticsearch-6.x]
      name=Elasticsearch repository for 6.x packages
      baseurl=https://artifacts.elastic.co/packages/6.x/yum
      gpgcheck=1
      gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
      enabled=1
      autorefresh=1
      type=rpm-md

3. Install Elasticsearch package along with dependencies.

   # yum install -y elasticsearch

4. Configure Elasticsearch if necessary by editing /etc/elasticsearch/elasticsearch.yml.
5. Configure firewall for Elasticsearch service.
   1. Enable network access to port 9200and 9300.

      # firewall-cmd --permanent --add-port=9200/tcp
      # firewall-cmd --permanent --add-port=9300/tcp

   2. Reload firewall rules and keep state information.

      # firewall-cmd --reload

6. Configure Elasticsearch service to automatically start during boot.

   # systemctl enable elasticsearch

7. Start Elasticsearch service.

   # systemctl start elasticsearch

   The service will take a while to start

8. Test if installation is successful.

   $ curl 127.0.0.1:9200
   {
     "name" : "8v4rGQI",
     "cluster_name" : "elasticsearch",
     "cluster_uuid" : "nkZIqfkpSyCdh_jg3nqWfw",
     "version" : {
       "number" : "6.2.2",
       "build_hash" : "10b1edd",
       "build_date" : "2018-02-16T19:01:30.685723Z",
       "build_snapshot" : false,
       "lucene_version" : "7.2.1",
       "minimum_wire_compatibility_version" : "5.6.0",
       "minimum_index_compatibility_version" : "5.0.0"
     },
     "tagline" : "You Know, for Search"
   }

Canonical developed Unity as a graphical shell for GNOME and was first introduced in Ubuntu 10.10. Canonical has since stopped the development of Unity though UBports now maintains it. …
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